Add ProjectCode support to build orders (#4808)

* Add "project_code" field to Build model

* Add "project_code" field to Build model

* build javascript updates

(cherry picked from commit 3e27a3b739)

* Update table filters

(cherry picked from commit 196c675585)

* Adds API filtering

* Bump API version

* Hide project code field from build form if project codes not enabled

(cherry picked from commit 4e210e3dfa)

* refactoring to attempt to fix circular imports

* Upgrade django-test-migrations package

* Fix broken import

* Further fixes for unit tests

* Update unit tests for migration files

* Fix typo in build.js

* Migration test updates

- Need to specify MPTT stuff

* Fix build.js

* Fix migration order

* Update API version

InvenTree/build/test_migrations.py

@@ -19,22 +19,15 @@ class TestForwardMigrations(MigratorTestCase):
             name='Widget',
             description='Buildable Part',
             active=True,
+            level=0, lft=0, rght=0, tree_id=0,
         )
 
-        with self.assertRaises(TypeError):
-            # Cannot set the 'assembly' field as it hasn't been added to the db schema
-            Part.objects.create(
-                name='Blorb',
-                description='ABCDE',
-                assembly=True
-            )
-
         Build = self.old_state.apps.get_model('build', 'build')
 
         Build.objects.create(
             part=buildable_part,
             title='A build of some stuff',
-            quantity=50
+            quantity=50,
         )
 
     def test_items_exist(self):
@@ -67,7 +60,8 @@ class TestReferenceMigration(MigratorTestCase):
 
         part = Part.objects.create(
             name='Part',
-            description='A test part'
+            description='A test part',
+            level=0, lft=0, rght=0, tree_id=0,
         )
 
         Build = self.old_state.apps.get_model('build', 'build')